remove unused file

examples/wrappers/CMakeLists.txt

-# Build a C wrapper for OpenMM
-
-
-# Should rebuild this if anything changes, but here we're
-# just listing the local cpp and h files as dependencies.
-ADD_LIBRARY(${OpenMM_CWRAPPER_LIB}  SHARED
-	OpenMM_CWrapper.cpp OpenMM_CWrapper.h) 	
-TARGET_LINK_LIBRARIES(${OpenMM_CWRAPPER_LIB} ${SHARED_TARGET})
-
-SET_TARGET_PROPERTIES(${OpenMM_CWRAPPER_LIB} PROPERTIES
-	PROJECT_LABEL "Example - C Wrapper")
-
-INSTALL(FILES OpenMM_CWrapper.cpp 
-              OpenMM_CWrapper.h 
-              OpenMM_Module.f90 
-        DESTINATION examples)