[DebugInfo] Remove an outdated test.

[ikudrin]

Summary

64-bit DWARF is supported for most of the sections, and there are separate tests for each of them. This test uses a binary input, while the preferable way is to have a text-based source. Thus, it looks like this test may be safely removed.

llvm/test/DebugInfo/dwarfdump-64-bit-dwarf.test

-RUN: llvm-dwarfdump %p/Inputs/dwarfdump.elf-mips64-64-bit-dwarf \
-RUN:   --debug-line | FileCheck %s
-
-# FIXME: llvm-dwarfdump's support for 64-bit dwarf is currently limited to
-# .debug_line.
-
-CHECK:   total_length: 0x00000212
-CHECK:        version: 2
-CHECK:prologue_length: 0x000001ab
-CHECK:min_inst_length: 1
-CHECK:default_is_stmt: 1
-CHECK:      line_base: -5
-CHECK:     line_range: 14
-CHECK:    opcode_base: 13
-CHECK: is_stmt end_sequence
-
-CHECK:   total_length: 0x0000007c
-CHECK:        version: 2
-CHECK:prologue_length: 0x00000048
-CHECK:min_inst_length: 1
-CHECK:default_is_stmt: 1
-CHECK:      line_base: -5
-CHECK:     line_range: 14
-CHECK:    opcode_base: 13
-CHECK: is_stmt end_sequence
-
-CHECK:   total_length: 0x00000094
-CHECK:        version: 2
-CHECK:prologue_length: 0x00000044
-CHECK:min_inst_length: 1
-CHECK:default_is_stmt: 1
-CHECK:      line_base: -5
-CHECK:     line_range: 14
-CHECK:    opcode_base: 13
-CHECK: is_stmt end_sequence
-
-CHECK:   total_length: 0x0000007c
-CHECK:        version: 2
-CHECK:prologue_length: 0x00000048
-CHECK:min_inst_length: 1
-CHECK:default_is_stmt: 1
-CHECK:      line_base: -5
-CHECK:     line_range: 14
-CHECK:    opcode_base: 13
-CHECK: is_stmt end_sequence