remove enum constants which are never used

Author: frankgiordano

src/main/java/zowe/client/sdk/rest/type/ZosmfRequestType.java

@@ -37,18 +37,10 @@ public enum ZosmfRequestType {
      * Delete JSON type
      */
     DELETE_JSON,
-    /**
-     * Delete TEXT type
-     */
-    DELETE_TEXT,
     /**
      * Post-JSON type
      */
     POST_JSON,
-    /**
-     * Post-TEXT type
-     */
-    POST_TEXT,
     /**
      * Get STREAM type
      */