Remove unused references

app/build.gradle

@@ -11,7 +11,6 @@ android {
         versionCode 17
         versionName "1.0.12-beta"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-        resValue "string", "google_maps_key", (project.findProperty("GOOGLE_MAPS_API_KEY") ?: "")
         vectorDrawables.useSupportLibrary = true
     }
     buildTypes {

app/src/main/res/drawable-hdpi/bottom_card_background.xml

-<?xml version="1.0" encoding="utf-8"?>
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <!-- Drop Shadow Stack -->
-
-    <!-- Background -->
-    <item>
-        <shape>
-            <solid android:color="#e5e5e5" />
-        </shape>
-    </item>
-</layer-list>
\ No newline at end of file

app/src/main/res/drawable-hdpi/cardui_background.xml

-<?xml version="1.0" encoding="utf-8"?>
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-    <item>
-        <shape android:shape="rectangle">
-            <solid android:color="#30555555" />
-            <corners android:radius="2dp" />
-        </shape>
-    </item>
-
-    <item
-        android:bottom="2dp"
-        android:left="0dp"
-        android:right="0dp"
-        android:top="0dp">
-        <shape android:shape="rectangle">
-            <solid android:color="#FFFFFF" />
-            <corners android:radius="2dp" />
-        </shape>
-    </item>
-</layer-list>
\ No newline at end of file

app/src/main/res/drawable-hdpi/image_background.xml

-<?xml version="1.0" encoding="utf-8"?>
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <!-- Drop Shadow Stack -->
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#00999999" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#10999999" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#20999999" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#10999999" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#00999999" />
-        </shape>
-    </item>
-
-    <!-- Background -->
-    <item>
-        <shape>
-            <solid android:color="@android:color/transparent" />
-        </shape>
-    </item>
-</layer-list>
\ No newline at end of file

app/src/main/res/drawable-hdpi/searchbar_background.xml

-<?xml version="1.0" encoding="utf-8"?>
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <!-- Drop Shadow Stack -->
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#00999999" />
-            <corners android:radius="5dp" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#00999999" />
-            <corners android:radius="5dp" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#00999999" />
-            <corners android:radius="5dp" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#00999999" />
-            <corners android:radius="5dp" />
-        </shape>
-    </item>
-    <item>
-        <shape>
-            <padding
-                android:bottom="1dp"
-                android:left="1dp"
-                android:right="1dp"
-                android:top="1dp" />
-            <solid android:color="#00999999" />
-            <corners android:radius="5dp" />
-        </shape>
-    </item>
-
-    <!-- Background -->
-    <item>
-        <shape>
-            <gradient
-                android:angle="90"
-                android:centerColor="#FFf6f6f6"
-                android:centerX="6%"
-                android:endColor="#FFffffff"
-                android:startColor="#FFe4e4e4"
-                android:type="linear" />
-            <corners android:radius="5dp" />
-        </shape>
-    </item>
-</layer-list>
\ No newline at end of file

app/src/main/res/drawable-hdpi/transparent_black_gradient.xml

-<?xml version="1.0" encoding="utf-8"?>
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="rectangle">
-    <gradient
-        android:angle="270"
-        android:centerColor="#19000000"
-        android:centerX="60%"
-        android:endColor="#FF000000"
-        android:startColor="#00000000"
-        android:type="linear" />
-</shape>
\ No newline at end of file