detect-environment: Removed RPMBUILD_CMD environment variable

AIX 5.3 is no longer supported, so we don't need this environment
variable anymore.

Ticket: ENT-12600
Signed-off-by: Lars Erik Wik <lars.erik.wik@northern.tech>

Author: larsewi

build-scripts/detect-environment

@@ -344,13 +344,6 @@ detect_tools()
         fatal "GNU Make not found"
     fi
 
-    if [ "$OS" = "aix" ] && [ "$OS_VERSION" = "5.3" ]; then
-        RPMBUILD_CMD=rpm
-    else
-        RPMBUILD_CMD=rpmbuild
-    fi
-    export RPMBUILD_CMD
-
     FUSER=$(func_whereis fuser)
     export FUSER
 

build-scripts/package

@@ -178,7 +178,7 @@ case "$PACKAGING" in
     #     - argv[2] = a b
     # Also note that $RPMBUILD_OPTIONS might have spaces
     # which must be preserved
-    eval "$RPMBUILD_CMD" -bb \
+    eval rpmbuild -bb \
       --define "'_topdir $BASEDIR/$PKG'" \
       --define "'buildprefix $BUILDPREFIX'" \
       --define "'_basedir $BASEDIR'" \

deps-packaging/pkg-build-rpm

@@ -112,7 +112,7 @@ fi
 # example cmd --define 'a b':
 #     - argv[1] = --define
 #     - argv[2] = a b
-eval $RPMBUILD_CMD -bb \
+eval rpmbuild -bb \
   --define "'_topdir $BASEDIR/$PKGNAME'" \
   --define "'version $VERSION'" \
   --define "'buildprefix $BUILDPREFIX'" \