tools: bpf: remove runqslower tool

runqslower was added in commit 9c01546 "tools/bpf: Add runqslower
tool to tools/bpf" as a BCC port to showcase early BPF CO-RE + libbpf
workflows. runqslower continues to live in BCC (libbpf-tools), so there
is no need to keep building and maintaining it.

Drop tools/bpf/runqslower and remove all build hooks in tools/bpf and
selftests accordingly.

Signed-off-by: Hoyeon Lee <[email protected]>

Author: HoyeonRhee

tools/bpf/Makefile

@@ -32,7 +32,7 @@ FEATURE_TESTS = libbfd disassembler-four-args disassembler-init-styled
 FEATURE_DISPLAY = libbfd
 
 check_feat := 1
-NON_CHECK_FEAT_TARGETS := clean bpftool_clean runqslower_clean resolve_btfids_clean
+NON_CHECK_FEAT_TARGETS := clean bpftool_clean resolve_btfids_clean
 ifdef MAKECMDGOALS
 ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
   check_feat := 0
@@ -70,7 +70,7 @@ $(OUTPUT)%.lex.o: $(OUTPUT)%.lex.c
 
 PROGS = $(OUTPUT)bpf_jit_disasm $(OUTPUT)bpf_dbg $(OUTPUT)bpf_asm
 
-all: $(PROGS) bpftool runqslower
+all: $(PROGS) bpftool
 
 $(OUTPUT)bpf_jit_disasm: CFLAGS += -DPACKAGE='bpf_jit_disasm'
 $(OUTPUT)bpf_jit_disasm: $(OUTPUT)bpf_jit_disasm.o
@@ -86,7 +86,7 @@ $(OUTPUT)bpf_exp.lex.c: $(OUTPUT)bpf_exp.yacc.c
 $(OUTPUT)bpf_exp.yacc.o: $(OUTPUT)bpf_exp.yacc.c
 $(OUTPUT)bpf_exp.lex.o: $(OUTPUT)bpf_exp.lex.c
 
-clean: bpftool_clean runqslower_clean resolve_btfids_clean
+clean: bpftool_clean resolve_btfids_clean
 	$(call QUIET_CLEAN, bpf-progs)
 	$(Q)$(RM) -r -- $(OUTPUT)*.o $(OUTPUT)bpf_jit_disasm $(OUTPUT)bpf_dbg \
 	       $(OUTPUT)bpf_asm $(OUTPUT)bpf_exp.yacc.* $(OUTPUT)bpf_exp.lex.*
@@ -112,18 +112,11 @@ bpftool_install:
 bpftool_clean:
 	$(call descend,bpftool,clean)
 
-runqslower:
-	$(call descend,runqslower)
-
-runqslower_clean:
-	$(call descend,runqslower,clean)
-
 resolve_btfids:
 	$(call descend,resolve_btfids)
 
 resolve_btfids_clean:
 	$(call descend,resolve_btfids,clean)
 
 .PHONY: all install clean bpftool bpftool_install bpftool_clean \
-	runqslower runqslower_clean \
 	resolve_btfids resolve_btfids_clean