diff --git a/Sources/GRPCCodeGen/CodeGenerationRequest.swift b/Sources/GRPCCodeGen/CodeGenerationRequest.swift
index fbe545dbe..5106b3c58 100644
--- a/Sources/GRPCCodeGen/CodeGenerationRequest.swift
+++ b/Sources/GRPCCodeGen/CodeGenerationRequest.swift
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-import Foundation
-
 /// Describes the services, dependencies and trivia from an IDL file,
 /// and the IDL itself through its specific serializer and deserializer.
 public struct CodeGenerationRequest {
diff --git a/Sources/GRPCCodeGen/Internal/Renderer/TextBasedRenderer.swift b/Sources/GRPCCodeGen/Internal/Renderer/TextBasedRenderer.swift
index c7c6f3850..0900169c0 100644
--- a/Sources/GRPCCodeGen/Internal/Renderer/TextBasedRenderer.swift
+++ b/Sources/GRPCCodeGen/Internal/Renderer/TextBasedRenderer.swift
@@ -26,7 +26,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
-import Foundation
 
 /// An object for building up a generated file line-by-line.
 ///
diff --git a/Sources/GRPCCodeGen/Internal/Translator/Docs.swift b/Sources/GRPCCodeGen/Internal/Translator/Docs.swift
index c0017e293..f8c6def00 100644
--- a/Sources/GRPCCodeGen/Internal/Translator/Docs.swift
+++ b/Sources/GRPCCodeGen/Internal/Translator/Docs.swift
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-import Foundation
-
 package enum Docs {
   package static func suffix(_ header: String, withDocs footer: String) -> String {
     if footer.isEmpty {
@@ -58,7 +56,9 @@ package enum Docs {
       """
 
     let body = docs.split(separator: "\n").map { line in
-      "/// > " + line.dropFirst(4).trimmingCharacters(in: .whitespaces)
+      var line = "/// > " + line.dropFirst(4)
+      line.trimPrefix(while: { $0.isWhitespace })
+      return String(line.drop(while: { $0.isWhitespace }))
     }.joined(separator: "\n")
 
     return header + "\n" + body
diff --git a/Sources/GRPCCodeGen/Internal/TypeName.swift b/Sources/GRPCCodeGen/Internal/TypeName.swift
index 0152de6a0..35d5eb77a 100644
--- a/Sources/GRPCCodeGen/Internal/TypeName.swift
+++ b/Sources/GRPCCodeGen/Internal/TypeName.swift
@@ -26,7 +26,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
-import Foundation
 
 /// A fully-qualified type name that contains the components of the Swift
 /// type name.