Issue #1053 - Drop support Android and remove Fennec - Part 1a: Remove mobile/android

mobile/android/app/omnijar/build.gradle

@@ -1,33 +0,0 @@
-buildDir "${topobjdir}/gradle/build/mobile/android/omnijar"
-
-apply plugin: 'java'
-
-// This project is a dummy project; the JAR produced is not used.  The :app
-// project uses the set of inputs here to check if the omnijar needs to be
-// rebuilt.  By listing them here as resource directories, IntelliJ labels each
-// checked directly nicely.  Why list the directories here?  There's a mismatch
-// between SourceDirectorySet and TaskInputs: the former is directory oriented,
-// while the latter is more general.  That means its easy to convert this list
-// into inputs for :app, but not vice-versa.  Sadly this implies that :app
-// evaluation depends on :omnijar, but the evaluation overhead is low enough
-// that we accept it.
-sourceSets {
-    main {
-        // Depend on the Gecko resources in mobile/android.
-        resources {
-            srcDir "${topsrcdir}/mobile/android/chrome"
-            srcDir "${topsrcdir}/mobile/android/components"
-            srcDir "${topsrcdir}/mobile/android/locales"
-            srcDir "${topsrcdir}/mobile/android/modules"
-            srcDir "${topsrcdir}/mobile/android/themes"
-            srcDir "${topsrcdir}/toolkit"
-        }
-    }
-}
-
-apply plugin: 'idea'
-
-idea {
-    module {
-    }
-}