Github action: update checking for gfortran after brew install

Author: wkliao

.github/workflows/mac_mpich.yml

@@ -36,26 +36,7 @@ jobs:
             brew install gcc
             which gcc
             gcc --version
-            ls -l /usr/local/bin/gfortran*
-            version=12
-            ln -fs /usr/local/bin/gfortran-${version} /usr/local/bin/gfortran
-            ln -fs /usr/local/bin/gcc-${version} /usr/local/bin/gcc
-            ln -fs /usr/local/bin/g++-${version} /usr/local/bin/g++
-            # link lib dir for previous GCC versions to avoid missing .dylib issues
-            for (( i=12; i>4; i-- ))
-            do
-              gcc_lib_path="/usr/local/opt/gcc/lib/gcc/$i"
-              if [ -d $gcc_lib_path ]; then
-                echo "found $gcc_lib_path"
-                for (( j=$i; j>4; j-- ))
-                do
-                  ln -fs /usr/local/opt/gcc/lib/gcc/$i /usr/local/opt/gcc/lib/gcc/$j
-                done
-                break
-              fi
-            done
             which gfortran
-            gfortran --version
             brew install automake autoconf libtool m4
         - name: Build MPICH
           run: |

.github/workflows/mac_openmpi.yml

@@ -36,26 +36,7 @@ jobs:
             brew install gcc
             which gcc
             gcc --version
-            ls -l /usr/local/bin/gfortran*
-            version=12
-            ln -fs /usr/local/bin/gfortran-${version} /usr/local/bin/gfortran
-            ln -fs /usr/local/bin/gcc-${version} /usr/local/bin/gcc
-            ln -fs /usr/local/bin/g++-${version} /usr/local/bin/g++
-            # link lib dir for previous GCC versions to avoid missing .dylib issues
-            for (( i=12; i>4; i-- ))
-            do
-              gcc_lib_path="/usr/local/opt/gcc/lib/gcc/$i"
-              if [ -d $gcc_lib_path ]; then
-                echo "found $gcc_lib_path"
-                for (( j=$i; j>4; j-- ))
-                do
-                  ln -fs /usr/local/opt/gcc/lib/gcc/$i /usr/local/opt/gcc/lib/gcc/$j
-                done
-                break
-              fi
-            done
             which gfortran
-            gfortran --version
             brew install automake autoconf libtool m4
         - name: Build OPENMPI
           run: |