tools: bpf: Fix error in 'make -C tools/ bpf_install'

make[2]: *** No rule to make target 'install'.  Stop.
make[1]: *** [Makefile:122: runqslower_install] Error 2
make: *** [Makefile:116: bpf_install] Error 2

There is no rule for target 'install' in tools/bpf/runqslower/Makefile,
and there is no need to install it, so just remove 'runqslower_install'.

Fixes: 9c01546d ("tools/bpf: Add runqslower tool to tools/bpf")
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210628030409.3459095-1-liwei391@huawei.com

tools/bpf/Makefile

@@ -97,7 +97,7 @@ clean: bpftool_clean runqslower_clean resolve_btfids_clean
 	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpf
 	$(Q)$(RM) -r -- $(OUTPUT)feature
 
-install: $(PROGS) bpftool_install runqslower_install
+install: $(PROGS) bpftool_install
 	$(call QUIET_INSTALL, bpf_jit_disasm)
 	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/bin
 	$(Q)$(INSTALL) $(OUTPUT)bpf_jit_disasm $(DESTDIR)$(prefix)/bin/bpf_jit_disasm
@@ -118,9 +118,6 @@ bpftool_clean:
 runqslower:
 	$(call descend,runqslower)
 
-runqslower_install:
-	$(call descend,runqslower,install)
-
 runqslower_clean:
 	$(call descend,runqslower,clean)
 
@@ -131,5 +128,5 @@ resolve_btfids_clean:
 	$(call descend,resolve_btfids,clean)
 
 .PHONY: all install clean bpftool bpftool_install bpftool_clean \
-	runqslower runqslower_install runqslower_clean \
+	runqslower runqslower_clean \
 	resolve_btfids resolve_btfids_clean