SuperBuild: remove patch, already in sources

SuperBuild/patches/OPENCV/opencv-fix-rpath-for-macx.diff

-diff -burN opencv-2.4.11.orig/cmake/OpenCVModule.cmake opencv-2.4.11/cmake/OpenCVModule.cmake
---- opencv-2.4.11.orig/cmake/OpenCVModule.cmake	2016-04-19 12:20:03.000000000 +0200
-+++ opencv-2.4.11/cmake/OpenCVModule.cmake	2016-04-19 12:21:06.000000000 +0200
-@@ -589,7 +589,6 @@
-     ARCHIVE_OUTPUT_DIRECTORY ${LIBRARY_OUTPUT_PATH}
-     LIBRARY_OUTPUT_DIRECTORY ${LIBRARY_OUTPUT_PATH}
-     RUNTIME_OUTPUT_DIRECTORY ${EXECUTABLE_OUTPUT_PATH}
--    INSTALL_NAME_DIR lib
-   )
- 
-   # For dynamic link numbering convenions