move zipsigner into this app, its not maintained anywhere else

app/build.gradle

@@ -49,6 +49,10 @@ dependencies {
     compile 'com.fasterxml.jackson.core:jackson-annotations:2.8.7'
     compile 'com.fasterxml.jackson.core:jackson-databind:2.8.7'
 
+    compile 'com.madgag.spongycastle:pkix:1.54.0.0'
+    compile 'com.madgag.spongycastle:prov:1.54.0.0'
+    compile 'com.madgag.spongycastle:core:1.54.0.0'
+
     testCompile "org.robolectric:robolectric:3.3.2"
     testCompile 'junit:junit:4.12'
     // As per https://github.com/robolectric/robolectric/issues/1932#issuecomment-219796474
@@ -60,22 +64,6 @@ dependencies {
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
 
-if (!hasProperty('sourceDeps')) {
-
-    dependencies {
-        compile 'com.madgag.spongycastle:pkix:1.54.0.0'
-        compile 'com.madgag.spongycastle:prov:1.54.0.0'
-        compile 'com.madgag.spongycastle:core:1.54.0.0'
-
-        // Upstream doesn't have a binary on mavenCentral, and it is an SVN repo on
-        // Google Code.  We include this code directly in this repo, and have made
-        // modifications that should be pushed to anyone who wants to maintain it.
-        compile files('libs/binaryDeps/zipsigner.jar')
-    }
-
-    // Only do the libraries imported from maven repositories. Our own libraries
-    // (like privileged-api-lib) and the prebuilt jars already checked into the
-    // source code don't need to be here.
 // generate using: `gradle -q calculateChecksums | sort -V`
 dependencyVerification {
     verify = [
@@ -127,34 +115,6 @@ if (!hasProperty('sourceDeps')) {
     ]
 }
 
-} else {
-
-    logger.info "Setting up *source* dependencies for F-Droid (because you passed in the -PsourceDeps argument to gradle while building)."
-
-    dependencies {
-        compile project(':extern:zipsigner')
-    }
-
-    task binaryDeps(type: Copy, dependsOn: ':app:prepareReleaseDependencies') {
-
-        enabled = project.hasProperty('sourceDeps')
-        description = "Copies .jar and .aar files from subproject dependencies in extern/ to app/libs. Requires the sourceDeps property to be set (\"gradle -PsourceDeps binaryDeps\")"
-
-        from('../extern/') {
-            include 'zipsigner/build/libs/zipsigner.jar'
-        }
-
-        into 'libs/binaryDeps'
-        includeEmptyDirs false
-
-        eachFile { FileCopyDetails details ->
-            // Don't copy to a sub folder such as libs/binaryDeps/Project/build/outputs/aar/project.aar, but
-            // rather libs/binaryDeps/project.aar.
-            details.path = details.name
-        }
-    }
-}
-
 def isCi = "true".equals(System.getenv("CI"))
 def preDexEnabled = "true".equals(System.getProperty("pre-dex", "true"))