Revert "internal/lsp: enable semantic tokens by default"

This reverts commit 5ab822f631.

Reason for revert: Too early to enable since we need to figure out a plan for formatting directives

Change-Id: I46567b271d4ecd7e4af574221520a72bd8b8e500
Reviewed-on: https://go-review.googlesource.com/c/tools/+/324289
Trust: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Peter Weinberger <pjw@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

gopls/doc/settings.md

@@ -213,7 +213,7 @@ Default: `{"gc_details":false,"generate":true,"regenerate_cgo":true,"tidy":true,
 semanticTokens controls whether the LSP server will send
 semantic tokens to the client.
 
-Default: `true`.
+Default: `false`.
 
 #### Completion
 

internal/lsp/source/api_json.go

@@ -697,7 +697,7 @@ var GeneratedAPIJSON = &APIJSON{
 					Keys:      nil,
 				},
 				EnumValues: nil,
-				Default:    "true",
+				Default:    "false",
 				Status:     "experimental",
 				Hierarchy:  "ui",
 			},

internal/lsp/source/options.go

@@ -143,7 +143,6 @@ func DefaultOptions() *Options {
 						string(command.UpgradeDependency): true,
 						string(command.Vendor):            true,
 					},
-					SemanticTokens: true,
 				},
 			},
 			InternalOptions: InternalOptions{