build_image: Remove mkerofsimage.sh.

These wrapper scripts are difficult to maintain and there's not really
any value add. The argument strings don't match and every new build flag
has to be connected in an extra place.

Bug: 222715577
Test: make with EROFS enabled
Change-Id: Ie0e51cc30aa08b004d5d8345a2a2d885e193ffa9
diff --git a/core/Makefile b/core/Makefile
index f7b55e6..b8fdf45 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1691,7 +1691,7 @@
     $(BOARD_ODM_DLKMIMAGE_FILE_SYSTEM_TYPE) \
     $(BOARD_SYSTEM_DLKMIMAGE_FILE_SYSTEM_TYPE) \
   ,erofs),)
-INTERNAL_USERIMAGES_DEPS += $(MKEROFSUSERIMG)
+INTERNAL_USERIMAGES_DEPS += $(MKEROFS)
 BOARD_EROFS_COMPRESSOR ?= "lz4hc,9"
 endif
 
@@ -4657,7 +4657,6 @@
   mke2fs \
   mke2fs.conf \
   mkfs.erofs \
-  mkerofsimage.sh \
   mkf2fsuserimg.sh \
   mksquashfs \
   mksquashfsimage.sh \