[yaml2obj][test] - Remove excessive symtab-shinfo.yaml.

[grimar]

Summary

The same testing is performed in implicit-sections-info.yaml:
https://github.com/llvm-mirror/llvm/blob/master/test/tools/yaml2obj/implicit-sections-info.yaml

[jhenderson]

LGTM.

llvm/test/tools/yaml2obj/ELF/symtab-shinfo.yaml

-## Check we are able to set sh_info field for SHT_SYMTAB sections.
-# RUN: yaml2obj %s -o %t
-# RUN: llvm-readobj --sections %t | FileCheck %s
-
-# CHECK:      Name: .symtab
-# CHECK-NEXT: Type: SHT_SYMTAB
-# CHECK-NEXT: Flags [
-# CHECK-NEXT: ]
-# CHECK-NEXT: Address:
-# CHECK-NEXT: Offset:
-# CHECK-NEXT: Size:
-# CHECK-NEXT: Link:
-# CHECK-NEXT: Info: 42
-# CHECK:      Name: .dynsym
-# CHECK-NEXT: Type: SHT_DYNSYM
-# CHECK-NEXT: Flags [
-# CHECK-NEXT:   SHF_ALLOC
-# CHECK-NEXT: ]
-# CHECK-NEXT: Address:
-# CHECK-NEXT: Offset:
-# CHECK-NEXT: Size:
-# CHECK-NEXT: Link:
-# CHECK-NEXT: Info: 26
-
---- !ELF
-FileHeader:
-  Class:   ELFCLASS64
-  Data:    ELFDATA2LSB
-  Type:    ET_REL
-  Machine: EM_X86_64
-Sections:
-  - Name: .symtab
-    Info: 42
-    Type: SHT_SYMTAB
-  - Name: .dynsym
-    Info: 26
-    Type: SHT_DYNSYM
-Symbols:
-  - Name:    foo
-    Binding: STB_GLOBAL
-DynamicSymbols:
-  - Name:    bar
-    Binding: STB_GLOBAL