diff --git a/Source/Android/app/build.gradle b/Source/Android/app/build.gradle
index e84718e460..9765e7fbbf 100644
--- a/Source/Android/app/build.gradle
+++ b/Source/Android/app/build.gradle
@@ -98,8 +98,6 @@ dependencies {
     // For loading huge screenshots from the disk.
     implementation 'com.squareup.picasso:picasso:2.71828'
 
-    // Allows FRP-style asynchronous operations in Android.
-    implementation 'io.reactivex:rxandroid:1.2.1'
     implementation 'com.nononsenseapps:filepicker:4.1.0'
 }
 
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/Action1.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/Action1.java
new file mode 100644
index 0000000000..9e0d3c7b7c
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/Action1.java
@@ -0,0 +1,6 @@
+package org.dolphinemu.dolphinemu.utils;
+
+public interface Action1<T>
+{
+  void call(T t);
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/DirectoryStateReceiver.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/DirectoryStateReceiver.java
index fe51b41c3f..14ee85e402 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/DirectoryStateReceiver.java
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/DirectoryStateReceiver.java
@@ -6,8 +6,6 @@ import android.content.Intent;
 
 import org.dolphinemu.dolphinemu.utils.DirectoryInitialization.DirectoryInitializationState;
 
-import rx.functions.Action1;
-
 public class DirectoryStateReceiver extends BroadcastReceiver
 {
   Action1<DirectoryInitializationState> callback;