Remove AndroidPinning dependency

Its use was removed long ago, and the dependency was left behind for
some reason. This commit can be reverted if it's needed in the future
again.

This of course slightly simplifies the build thus speeding it a little,
but what's more interesting is that the output apk is also ~100KB
smaller. So something is going on.

F-Droid/AndroidManifest.xml

@@ -8,7 +8,6 @@
     >
 
     <uses-sdk
-        tools:overrideLibrary="org.thoughtcrime.ssl.pinning"
         android:minSdkVersion="8"
         android:targetSdkVersion="22"
         />

F-Droid/build.gradle

@@ -13,7 +13,6 @@ dependencies {
     compile 'com.android.support:appcompat-v7:22.2.1'
     compile 'com.android.support:support-annotations:22.2.1'
 
-    compile 'org.thoughtcrime.ssl.pinning:AndroidPinning:1.0.0'
     compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
     compile 'com.google.zxing:core:3.2.1'
     compile 'eu.chainfire:libsuperuser:1.0.0.201602011018'
@@ -64,7 +63,6 @@ if (!hasProperty('sourceDeps')) {
             'com.android.support:support-v4:c62f0d025dafa86f423f48df9185b0d89496adbc5f6a9be5a7c394d84cf91423',
             'com.android.support:appcompat-v7:4b5ccba8c4557ef04f99aa0a80f8aa7d50f05f926a709010a54afd5c878d3618',
             'com.android.support:support-annotations:104f353b53d5dd8d64b2f77eece4b37f6b961de9732eb6b706395e91033ec70a',
-            'org.thoughtcrime.ssl.pinning:AndroidPinning:afa1d74e699257fa75cb109ff29bac50726ef269c6e306bdeffe8223cee06ef4',
             'com.nostra13.universalimageloader:universal-image-loader:dbd5197ffec3a8317533190870a7c00ff3750dd6a31241448c6a5522d51b65b4',
             'com.google.zxing:core:b4d82452e7a6bf6ec2698904b332431717ed8f9a850224f295aec89de80f2259',
             'eu.chainfire:libsuperuser:952c5fc82f9c31d31d2b6a7054ee267dac1685fb037a254888c73c48de661eaf',