diff --git a/clang-tools-extra/clangd/ClangdLSPServer.cpp b/clang-tools-extra/clangd/ClangdLSPServer.cpp
--- a/clang-tools-extra/clangd/ClangdLSPServer.cpp
+++ b/clang-tools-extra/clangd/ClangdLSPServer.cpp
@@ -534,10 +534,6 @@
        }},
       {"completionProvider",
        llvm::json::Object{
-           {"allCommitCharacters",
-            {" ", "\t", "(", ")", "[", "]", "{",  "}", "<",
-             ">", ":",  ";", ",", "+", "-", "/",  "*", "%",
-             "^", "&",  "#", "?", ".", "=", "\"", "'", "|"}},
            {"resolveProvider", false},
            // We do extra checks, e.g. that > is part of ->.
            {"triggerCharacters", {".", "<", ">", ":", "\"", "/", "*"}},
diff --git a/clang-tools-extra/clangd/test/initialize-params.test b/clang-tools-extra/clangd/test/initialize-params.test
--- a/clang-tools-extra/clangd/test/initialize-params.test
+++ b/clang-tools-extra/clangd/test/initialize-params.test
@@ -13,35 +13,6 @@
 # CHECK-NEXT:        "automaticReload": true
 # CHECK-NEXT:      },
 # CHECK-NEXT:      "completionProvider": {
-# CHECK-NEXT:        "allCommitCharacters": [
-# CHECK-NEXT:          " ",
-# CHECK-NEXT:          "\t",
-# CHECK-NEXT:          "(",
-# CHECK-NEXT:          ")",
-# CHECK-NEXT:          "[",
-# CHECK-NEXT:          "]",
-# CHECK-NEXT:          "{",
-# CHECK-NEXT:          "}",
-# CHECK-NEXT:          "<",
-# CHECK-NEXT:          ">",
-# CHECK-NEXT:          ":",
-# CHECK-NEXT:          ";",
-# CHECK-NEXT:          ",",
-# CHECK-NEXT:          "+",
-# CHECK-NEXT:          "-",
-# CHECK-NEXT:          "/",
-# CHECK-NEXT:          "*",
-# CHECK-NEXT:          "%",
-# CHECK-NEXT:          "^",
-# CHECK-NEXT:          "&",
-# CHECK-NEXT:          "#",
-# CHECK-NEXT:          "?",
-# CHECK-NEXT:          ".",
-# CHECK-NEXT:          "=",
-# CHECK-NEXT:          "\"",
-# CHECK-NEXT:          "'",
-# CHECK-NEXT:          "|"
-# CHECK-NEXT:        ],
 # CHECK-NEXT:        "resolveProvider": false,
 # CHECK-NEXT:        "triggerCharacters": [
 # CHECK-NEXT:          ".",