[test][llvm-dwarfdump][NFC] Delete unused check

[jhenderson]

Summary

Depends on D71755.

[jhenderson]

I've pushed this one out-of-sequence, as there's no need for it to wait on the other changes in the chain.

llvm/test/tools/llvm-dwarfdump/X86/debug_line_invalid.test

 # NONFATAL-NOT: debug_line[{{.*}}]
 
 # LASTONLY-NOT: debug_line[{{.*}}]
 # LASTONLY:     debug_line[0x000002af]
 # LASTONLY:     0x00000000cafebabe {{.*}} end_sequence
 
 # RESERVED: warning: parsing line table prologue at offset 0x00000048 unsupported reserved unit length found of value 0xfffffffe
 
-# MD5: warning: parsing line table prologue at 0x00000000 found an invalid directory or file table description at 0x0000003b
-# MD5-NEXT: warning: failed to parse file entry because the MD5 hash is invalid
-
 # ALL-NOT:  warning:
 # ALL:      warning: parsing line table prologue at offset 0x00000048 found unsupported version 0x00
 # ALL-NEXT: warning: parsing line table prologue at offset 0x0000004e found unsupported version 0x01
 # ALL-NEXT: warning: parsing line table prologue at 0x00000054 found an invalid directory or file table description at 0x00000073
 # ALL-NEXT: warning: failed to parse entry content descriptions because no path was found
 # FIXME - The latter offset in the next line should be 0xad. The filename parsing code does not notice a missing terminating byte.
 # ALL-NEXT: warning: parsing line table prologue at 0x00000081 should have ended at 0x000000b9 but it ended at 0x000000ba
 # ALL-NEXT: warning: parsing line table prologue at 0x000000c9 should have ended at 0x00000104 but it ended at 0x00000103