Remove deprecated methods in read preference classes

JAVA-5145

Author: jyemin

driver-core/src/main/com/mongodb/ReadPreference.java

@@ -101,15 +101,6 @@ public abstract class ReadPreference {
      */
     public abstract ReadPreference withHedgeOptions(ReadPreferenceHedgeOptions hedgeOptions);
 
-    /**
-     * True if this read preference allows reading from a secondary member of a replica set.
-     *
-     * @return if reading from a secondary is ok
-     * @deprecated Prefer {@link #isSecondaryOk()}
-     */
-    @Deprecated
-    public abstract boolean isSlaveOk();
-
     /**
      * True if this read preference allows reading from a secondary member of a replica set.
      *
@@ -696,11 +687,6 @@ public TaggableReadPreference withHedgeOptions(final ReadPreferenceHedgeOptions
             throw new UnsupportedOperationException("Primary read preference can not also specify hedge");
         }
 
-        @Override
-        public boolean isSlaveOk() {
-            return false;
-        }
-
         @Override
         public boolean isSecondaryOk() {
             return false;

driver-core/src/main/com/mongodb/TaggableReadPreference.java

@@ -83,12 +83,6 @@ public abstract class TaggableReadPreference extends ReadPreference {
     @Override
     public abstract TaggableReadPreference withHedgeOptions(ReadPreferenceHedgeOptions hedgeOptions);
 
-    @Override
-    @Deprecated
-    public boolean isSlaveOk() {
-        return true;
-    }
-
     @Override
     public boolean isSecondaryOk() {
         return true;