Removes broken conditional check.

The FindPetsc module would check for a PETSC_ROOT and not attempt to look for
mpi and the petsc header if this was not set, which it in most cases won't be.
If the variable is set then the conditional include is redundant, as it will
search the explicitly passed paths first anyways.

cmake/Modules/FindPetsc.cmake

@@ -67,24 +67,20 @@ if (Petsc_ROOT)
  set (PETSC_ROOT "${Petsc_ROOT}")
 endif (Petsc_ROOT)
 if (NOT PETSC_NORMAL_INCLUDE_DIR)
-  if (PETSC_ROOT)
 	find_path (PETSC_NORMAL_INCLUDE_DIR
 	  NAMES "petsc.h"
 	  PATHS ${PETSC_ROOT}
 	  PATH_SUFFIXES "petsc-3.4.4" "include"
 	  NO_DEFAULT_PATH
 	  )
-  endif (PETSC_ROOT)
 endif (NOT PETSC_NORMAL_INCLUDE_DIR)
 if (NOT PETSC_MPIUNI_INCLUDE_DIR)
-  if (PETSC_ROOT)
 	find_path (PETSC_MPIUNI_INCLUDE_DIR
 	  NAMES "mpi.h"
 	  PATHS ${PETSC_ROOT}/include
 	  PATH_SUFFIXES "mpiuni"
 	  NO_DEFAULT_PATH
 	  )
-  endif (PETSC_ROOT)
 endif (NOT PETSC_MPIUNI_INCLUDE_DIR)
 # look for actual Petsc library
 if (NOT PETSC_LIBRARY)