Remove python pyc file before uninstall

I6520b51aac34060b5b90f94a016cec1827a4973f happens after uninstall, which
leaves a dangling directory under /opt/rocm/libexec/rocm_smi.
Removing __pycache__ before uninstall fixes the issue.

Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>
Change-Id: I695bd085d4a43b678b563b4c35f6d2e8ddfa7d7c

RPM/postun.in

@@ -4,6 +4,3 @@ if [ $1 -le 1 ] && [ "@ENABLE_LDCONFIG@" == "ON" ]; then
     rm -f /etc/ld.so.conf.d/x86_64-librocm_smi_lib.conf
     ldconfig
 fi
-
-# remove pyc file generated by python
-rm -rf @CPACK_PACKAGING_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBEXECDIR@/rocm_smi/__pycache__

RPM/preun.in

@@ -0,0 +1,5 @@
+if [ $1 -le 1 ]; then
+    # perform the below actions for rpm remove($1=0) or upgrade($1=1) operations
+    # remove pyc file generated by python
+    rm -rf @CPACK_PACKAGING_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBEXECDIR@/rocm_smi/__pycache__
+fi