package/linux-tools: perf: ditch redundant -f 'rm' flag

The value of the RM variable in make is 'rm -f' [0], thus the additional
-f is redundant.

[0] https://www.gnu.org/software/make/manual/make.html#index-RM

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/linux-tools/linux-tool-perf.mk.in

@@ -166,8 +166,8 @@ endef
 # target unless BR2_PACKAGE_LINUX_TOOLS_PERF_SCRIPTS is enabled
 ifeq ($(BR2_PACKAGE_LINUX_TOOLS_PERF_SCRIPTS),)
 define PERF_INSTALL_REMOVE_SCRIPTS
-	$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/scripts/
-	$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/tests/
+	$(RM) -r $(TARGET_DIR)/usr/libexec/perf-core/scripts/
+	$(RM) -r $(TARGET_DIR)/usr/libexec/perf-core/tests/
 endef
 endif