Remove unneded line

Author: ClausKlein

cmake/gcovr.cfg.in

@@ -4,7 +4,6 @@ root = @CMAKE_SOURCE_DIR@
 cobertura = @CMAKE_BINARY_DIR@/coverage/cobertura.xml
 sonarqube = @CMAKE_BINARY_DIR@/coverage/sonarqube.xml
 html-details = @CMAKE_BINARY_DIR@/coverage/coverage.html
-# XXX gcov-executable = @GCOV_EXECUTABLE@
 gcov-parallel = yes
 html-theme = blue
 html-self-contained = yes