Fixing .clang-format to allow it to work with v10

On RHEL 8.3, the version of clang-format that Redhat provides is:

> clang-format --version
clang-format version 10.0.1 (Red Hat 10.0.1-1.module+el8.3.0+7459+90c24896)
> git --version
git v2.27.0

I tried to fix up master PR #8747 (master version of 8723) with the command:
`git clang-format -v HEAD~1` but ran into some issues with clang-format
v10.0.1 being able to parse the .clang-format file.

I did not spend much time trying to find viable alternatives, instead
I would just remove the offending line in the .clang-format file and
rince/repeat.

Are these options that we could do without, so that we could run
clang-format with both v10 and v11?

Signed-off-by: Geoffrey Paulsen <gpaulsen@us.ibm.com>

Author: gpaulsen

.clang-format

@@ -33,15 +33,13 @@ AccessModifierOffset: -2
 AlignAfterOpenBracket: Align
 AlignConsecutiveMacros: true
 AlignConsecutiveAssignments: false
-AlignConsecutiveBitFields: false
 AlignConsecutiveDeclarations: false
 AlignEscapedNewlines: Left
 AlignOperands: true
 AlignTrailingComments: true
 AllowAllArgumentsOnNextLine: false
 AllowAllConstructorInitializersOnNextLine: true
 AllowAllParametersOfDeclarationOnNextLine: true
-AllowShortEnumsOnASingleLine: true
 AllowShortBlocksOnASingleLine: Never
 AllowShortCaseLabelsOnASingleLine: false
 AllowShortFunctionsOnASingleLine: None
@@ -67,8 +65,6 @@ BraceWrapping:
   AfterExternBlock: false
   BeforeCatch:     false
   BeforeElse:      false
-  BeforeLambdaBody: false
-  BeforeWhile:     false
   IndentBraces:    false
   SplitEmptyFunction: true
   SplitEmptyRecord: true
@@ -119,13 +115,10 @@ IncludeCategories:
 IncludeIsMainRegex: '(Test)?$'
 IncludeIsMainSourceRegex: ''
 IndentCaseLabels: false
-IndentCaseBlocks: false
 IndentGotoLabels: true
 IndentPPDirectives: AfterHash
-IndentExternBlock: AfterExternBlock
 IndentWidth:     4
 IndentWrappedFunctionNames: false
-InsertTrailingCommas: None
 JavaScriptQuotes: Leave
 JavaScriptWrapImports: true
 KeepEmptyLinesAtTheStartOfBlocks: true
@@ -135,7 +128,6 @@ MaxEmptyLinesToKeep: 1
 NamespaceIndentation: None
 ObjCBinPackProtocolList: Auto
 ObjCBlockIndentWidth: 4
-ObjCBreakBeforeNestedBlockParam: true
 ObjCSpaceAfterProperty: false
 ObjCSpaceBeforeProtocolList: true
 PenaltyBreakAssignment: 250
@@ -178,10 +170,4 @@ StatementMacros:
 TabWidth:        8
 UseCRLF:         false
 UseTab:          Never
-WhitespaceSensitiveMacros:
-  - _STRINGIZE
-  - STRINGIZE
-  - PP_STRINGIZE
-  - BOOST_PP_STRINGIZE
 ...
-