cmake: Remove old 'additional' Boost versions from GrBoost.cmake

Author: mbr0wn

cmake/Modules/GrBoost.cmake

@@ -76,8 +76,7 @@ find_package(Boost ${GR_BOOST_MIN_VERSION} COMPONENTS ${BOOST_REQUIRED_COMPONENT
 # Boost version beyond what is shown here are produced, we must extend
 # this list. To disable Boost versions, see below.
 set(Boost_ADDITIONAL_VERSIONS
-    "1.45.0" "1.45" "1.46.0" "1.46" "1.47.0" "1.47" "1.48.0" "1.48" "1.49.0" "1.49"
-    "1.50.0" "1.50" "1.51.0" "1.51" "1.52.0" "1.52" "1.53.0" "1.53" "1.54.0" "1.54"
+    "1.53" "1.54.0" "1.54"
     "1.55.0" "1.55" "1.56.0" "1.56" "1.57.0" "1.57" "1.58.0" "1.58" "1.59.0" "1.59"
     "1.60.0" "1.60" "1.61.0" "1.61" "1.62.0" "1.62" "1.63.0" "1.63" "1.64.0" "1.64"
     "1.65.0" "1.65" "1.66.0" "1.66" "1.67.0" "1.67" "1.68.0" "1.68" "1.69.0" "1.69"