Remove unnecessary SUBDIRS loops from src/*/Makefile

There are no subdirectories in any of these directories or plans
for adding ones. As such, there is no point in running the loop
that does not do anything and can cause problems with some shells.

src/ap/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/common/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/crypto/Makefile

@@ -1,7 +1,6 @@
 all: libcrypto.a
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d libcrypto.a
 
 install:

src/drivers/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 	rm -f build.wpa_supplicant build.hostapd
 

src/eap_common/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/eap_peer/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.so *.d
 
 install:

src/eap_server/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/eapol_auth/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/eapol_supp/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/l2_packet/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/radius/Makefile

@@ -1,7 +1,6 @@
 all: libradius.a
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d libradius.a
 
 install:

src/rsn_supp/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install:

src/tls/Makefile

@@ -1,7 +1,6 @@
 all: libtls.a
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d libtls.a
 
 install:

src/utils/Makefile

@@ -1,7 +1,6 @@
 all: libutils.a
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d libutils.a
 
 install:

src/wps/Makefile

@@ -2,7 +2,6 @@ all:
 	@echo Nothing to be made.
 
 clean:
-	for d in $(SUBDIRS); do make -C $$d clean; done
 	rm -f *~ *.o *.d
 
 install: