Undo the external contributions we have accepted to the well-known types

For legal reasons we unfortunately cannot accept any external contributions to
the well-known type protos, so this change reverts the small number of changes
we have received so far.

PiperOrigin-RevId: 517211904
diff --git a/objectivec/GPBAny.pbobjc.h b/objectivec/GPBAny.pbobjc.h
index d5378f4..f4efbb2 100644
--- a/objectivec/GPBAny.pbobjc.h
+++ b/objectivec/GPBAny.pbobjc.h
@@ -74,7 +74,7 @@
  *       foo = any.unpack(Foo.getDefaultInstance());
  *     }
  *
- * Example 3: Pack and unpack a message in Python.
+ *  Example 3: Pack and unpack a message in Python.
  *
  *     foo = Foo(...)
  *     any = Any()
@@ -84,7 +84,7 @@
  *       any.Unpack(foo)
  *       ...
  *
- * Example 4: Pack and unpack a message in Go
+ *  Example 4: Pack and unpack a message in Go
  *
  *      foo := &pb.Foo{...}
  *      any, err := anypb.New(foo)
@@ -104,7 +104,7 @@
  * name "y.z".
  *
  * JSON
- *
+ * ====
  * The JSON representation of an `Any` value uses the regular
  * representation of the deserialized, embedded message, with an
  * additional field `\@type` which contains the type URL. Example:
diff --git a/objectivec/GPBApi.pbobjc.h b/objectivec/GPBApi.pbobjc.h
index 9c7e75a..e5554a1 100644
--- a/objectivec/GPBApi.pbobjc.h
+++ b/objectivec/GPBApi.pbobjc.h
@@ -245,7 +245,7 @@
  * The mixin construct implies that all methods in `AccessControl` are
  * also declared with same name and request/response types in
  * `Storage`. A documentation generator or annotation processor will
- * see the effective `Storage.GetAcl` method after inheriting
+ * see the effective `Storage.GetAcl` method after inherting
  * documentation and annotations as follows:
  *
  *     service Storage {
diff --git a/objectivec/GPBTimestamp.pbobjc.h b/objectivec/GPBTimestamp.pbobjc.h
index 2614e44..510ecc0 100644
--- a/objectivec/GPBTimestamp.pbobjc.h
+++ b/objectivec/GPBTimestamp.pbobjc.h
@@ -132,7 +132,7 @@
  * [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with
  * the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
  * the Joda Time's [`ISODateTimeFormat.dateTime()`](
- * http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D
+ * http://joda-time.sourceforge.net/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime()
  * ) to obtain a formatter capable of generating timestamps in this format.
  **/
 GPB_FINAL @interface GPBTimestamp : GPBMessage