Removed a duplicate from git ignore

Signed-off-by: doomsdayrs <doomsdayrs@gmail.com>

.gitignore

@@ -29,7 +29,6 @@ tests/proguard-project.txt
 # Android Studio and Gradle specific entries
 .gradle
 .idea
-*.iml
 build
 /gradle.properties
 .attach_pid*