gdb: remove BLOCK_RANGE macro

Replace with access through the block::ranges method.

Change-Id: I50f3ed433b997c9f354e49bc6583f540ae4b6121
diff --git a/gdb/block.h b/gdb/block.h
index 3782327..eb77f74 100644
--- a/gdb/block.h
+++ b/gdb/block.h
@@ -215,10 +215,6 @@ struct global_block
   struct compunit_symtab *compunit_symtab;
 };
 
-/* Access range array for block BL.  */
-
-#define BLOCK_RANGE(bl)		(bl)->ranges ().data ()
-
 /* Are all addresses within a block contiguous?  */
 
 #define BLOCK_CONTIGUOUS_P(bl)	((bl)->ranges ().size () == 0 \
@@ -240,7 +236,7 @@ struct global_block
 
 #define BLOCK_ENTRY_PC(bl)	(BLOCK_CONTIGUOUS_P (bl) \
 				 ? bl->start () \
-				 : BLOCK_RANGE (bl)[0].start ())
+				 : bl->ranges ()[0].start ())
 
 struct blockvector
 {