Avoid pre-initialization of the old hooks

Author: akarnokd

src/main/java/rx/plugins/RxJavaHooks.java

@@ -94,8 +94,6 @@ public void call(Throwable e) {
             }
         };
 
-        RxJavaPlugins.getInstance().getObservableExecutionHook();
-        
         onObservableCreate = new Func1<OnSubscribe, OnSubscribe>() {
             @Override
             public OnSubscribe call(OnSubscribe f) {
@@ -117,8 +115,6 @@ public Subscription call(Subscription f) {
             }
         };
 
-        RxJavaPlugins.getInstance().getSingleExecutionHook();
-
         onSingleCreate = new Func1<rx.Single.OnSubscribe, rx.Single.OnSubscribe>() {
             @Override
             public rx.Single.OnSubscribe call(rx.Single.OnSubscribe f) {
@@ -140,8 +136,6 @@ public Subscription call(Subscription f) {
             }
         };
 
-        RxJavaPlugins.getInstance().getCompletableExecutionHook();
-
         onCompletableCreate = new Func1<CompletableOnSubscribe, CompletableOnSubscribe>() {
             @Override
             public CompletableOnSubscribe call(CompletableOnSubscribe f) {