fix(style): drop clang-format #39514

Problem: C formatting is enforced in CI via uncrustify, but when working
on C code clangd formats on save via clang-format, forcing users to
manually run `make formatc` after they're done.

Solution: disable clang-format.

.clang-format

@@ -1,67 +1 @@
-BasedOnStyle:  Google
-Language: Cpp
-ColumnLimit: 100
-IndentWidth: 2
-TabWidth: 8
-UseTab: Never
-IndentCaseLabels: false
-BreakBeforeBraces: Custom
-AlignEscapedNewlinesLeft: false
-AllowShortFunctionsOnASingleLine: false
-AlignTrailingComments: true
-SpacesBeforeTrailingComments: 2
-PenaltyReturnTypeOnItsOwnLine: 200
-AllowAllParametersOfDeclarationOnNextLine: false
-AllowShortIfStatementsOnASingleLine: false
-AllowShortLoopsOnASingleLine: false
-BinPackParameters: true
-BreakBeforeBinaryOperators: true
-BreakBeforeTernaryOperators: true
-ContinuationIndentWidth: 2
-AlwaysBreakAfterDefinitionReturnType: None
-AlwaysBreakAfterReturnType: None
-AlwaysBreakBeforeMultilineStrings: No
-AlwaysBreakTemplateDeclarations: No
-AlignEscapedNewlines: DontAlign
-BinPackArguments: true
-BraceWrapping:
-  AfterClass:      false
-  AfterControlStatement: false
-  AfterEnum:       false
-  AfterFunction:   true
-  AfterObjCDeclaration: false
-  AfterStruct:     false
-  AfterUnion:      false
-  BeforeCatch:     false
-  BeforeElse:      false
-  IndentBraces:    false
-PointerAlignment: Right
-SortIncludes: true
-Cpp11BracedListStyle: false
-IncludeCategories:
-  - Regex:           '<[/[:alnum:].]+>'
-    Priority:        0
-  - Regex:           '^"(nvim|vim)/'
-    Priority:        1
-    SortPriority:    1
-    CaseSensitive:   false
-AlignConsecutiveMacros: AcrossEmptyLines
-IndentPPDirectives: AfterHash
-SpaceBeforeParens: ControlStatementsExceptControlMacros
-PPIndentWidth: 1
-ForEachMacros:
-  - FOR_ALL_AUEVENTS
-  - FOR_ALL_AUPATS_IN_EVENT
-  - FOR_ALL_BUFFERS
-  - FOR_ALL_BUFFERS_BACKWARDS
-  - FOR_ALL_FRAMES
-  - FOR_ALL_QFL_ITEMS
-  - FOR_ALL_SIGNS_IN_BUF
-  - FOR_ALL_TABS
-  - FOR_ALL_TAB_WINDOWS
-  - FOR_ALL_WINDOWS_IN_TAB
-  - RBUFFER_EACH
-  - RBUFFER_EACH_REVERSE
-  - RBUFFER_UNTIL_EMPTY
-  - RBUFFER_UNTIL_FULL
-  - kl_iter
+DisableFormat: true

CONTRIBUTING.md

@@ -214,13 +214,6 @@ make lint  # or lintc, lintlua, lintquery, lintdoc
     setlocal formatprg=uncrustify\ -q\ -l\ C\ -c\ src/uncrustify.cfg\ --no-backup
   endif
   ```
-- There is also `.clang-format` which is "mostly" aligned with uncrustify.
-  To use the Nvim `gq` command with `clang-format`:
-  ```vim
-  if !empty(findfile('.clang-format', ';'))
-    setlocal formatprg=clang-format\ -style=file
-  endif
-  ```
 
 ### Navigate
 

src/nvim/version.c

@@ -57,7 +57,6 @@ char *version_cflags = "Compilation: " NVIM_VERSION_CFLAGS;
 
 #include "version.c.generated.h"
 
-// clang-format off
 static const int vim_versions[] = { 801, 802, 900, 901, 902 };
 
 static const int num_patches[] = { 2331, 3825, 1582, 1630, 221 };
@@ -3962,7 +3961,6 @@ static const int *included_patchsets[] = {
     // 0
   },
 };
-// clang-format on
 
 /// Compares a version string to the current Nvim version.
 ///