remove quotes that are not needed in Windows makefile

Belonging to [master]:
  - #2252

SimulationRuntime/cpp/Makefile.omdev.mingw

@@ -37,28 +37,28 @@ else
 endif
 
 BOOST_STATIC_LINKING="false"
-ifeq ("$(BOOST_STATIC_LINKING)","true")
+ifeq ($(BOOST_STATIC_LINKING),"true")
 	BOOST_STATIC_LINKING_COMMAND=-DBOOST_STATIC_LINKING=ON
 else
 	BOOST_STATIC_LINKING_COMMAND=-DBOOST_STATIC_LINKING=OFF
 endif
 
 BOOST_REALPATHS="false"
-ifeq ("$(BOOST_REALPATHS)","true")
+ifeq ($(BOOST_REALPATHS),"true")
 	BOOST_REALPATHS_COMMAND=-DUSE_BOOST_REALPATHS=ON
 else
 	BOOST_REALPATHS_COMMAND=-DUSE_BOOST_REALPATHS=OFF
 endif
 
 RUNTIME_PROFILING="false"
-ifeq ("$(RUNTIME_PROFILING)","true")
+ifeq ($(RUNTIME_PROFILING),"true")
 	RUNTIME_PROFILING_COMMAND=-DRUNTIME_PROFILING=ON
 else
 	RUNTIME_PROFILING_COMMAND=-DRUNTIME_PROFILING=OFF
 endif
 
 SCOREP="false"
-ifeq ("$(SCOREP)","true")
+ifeq ($(SCOREP),"true")
 	USE_SCOREP_COMMAND=-DUSE_SCOREP=ON
 else
 	USE_SCOREP_COMMAND=-DUSE_SCOREP=OFF
@@ -68,35 +68,35 @@ SCOREP_HOME=""
 SCOREP_HOME_COMMAND=-DSCOREP_HOME=$(SCOREP_HOME)
 
 FMU_SUNDIALS="false"
-ifeq ("$(FMU_SUNDIALS)","true")
+ifeq ($(FMU_SUNDIALS),"true")
 	FMU_SUNDIALS_COMMAND=-DFMU_SUNDIALS=ON
 else
 	FMU_SUNDIALS_COMMAND=-DFMU_SUNDIALS=OFF
 endif
 
 PARALLEL_OUTPUT="false"
-ifeq ("$(PARALLEL_OUTPUT)","true")
+ifeq ($(PARALLEL_OUTPUT),"true")
 	PARALLEL_OUTPUT_COMMAND=-DUSE_PARALLEL_OUTPUT=ON
 else
 	PARALLEL_OUTPUT_COMMAND=-DUSE_PARALLEL_OUTPUT=OFF
 endif
 
 USE_LOGGER="true"
-ifeq ("$(USE_LOGGER)","true")
+ifeq ($(USE_LOGGER),"true")
 	USE_LOGGER_COMMAND=-DUSE_LOGGER:BOOL=ON
 else
 	USE_LOGGER_COMMAND=-DUSE_LOGGER:BOOL=OFF
 endif
 
 USE_TRILINOS="false"
-ifeq ("$(USE_TRILINOS)","true")
+ifeq ($(USE_TRILINOS),"true")
 	USE_TRILINOS_COMMAND=-DUSE_TRILINOS:BOOL=ON
 else
 	USE_TRILINOS_COMMAND=-DUSE_TRILINOS:BOOL=OFF
 endif
 
 USE_KLU="false"
-ifeq ("$(USE_KLU)","true")
+ifeq ($(USE_KLU),"true")
 	USE_KLU_COMMAND=-DUSE_KLU:BOOL=ON
 else
 	USE_KLU_COMMAND=-DUSE_KLU:BOOL=OFF