Remove pseudo targets for building shared libs

Thanks to the change "build: support library builds via lib/<libname>",
shared libraries can now be built directly by the build system.

Issue #4599

repos/base-okl4/recipes/src/base-okl4/content.mk

@@ -19,8 +19,7 @@ src/kernel/okl4: src/kernel
 
 content:
 	for spec in x86_32; do \
-	  mv lib/mk/spec/$$spec/ld-okl4.mk   lib/mk/spec/$$spec/ld.mk; \
+	  mv lib/mk/spec/$$spec/ld-okl4.mk lib/mk/spec/$$spec/ld.mk; \
 	  done;
-	sed -i "s/ld-okl4/ld/"          src/lib/ld/okl4/target.mk
 	sed -i "s/pit_timer_drv/timer/" src/timer/pit/target.inc
 

repos/base-okl4/src/lib/ld/okl4/target.mk

@@ -1,2 +0,0 @@
-TARGET = ld-okl4
-LIBS = ld-okl4