chore: remove All rights reserved clause from java.header (#487)

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Source-Link: googleapis/synthtool@09c59c2

java-core/java.header

@@ -1,5 +1,5 @@
 ^/\*$
-^ \* Copyright \d\d\d\d,? Google (Inc\.|LLC)( All [rR]ights [rR]eserved\.)?$
+^ \* Copyright \d\d\d\d,? Google (Inc\.|LLC)$
 ^ \*$
 ^ \* Licensed under the Apache License, Version 2\.0 \(the "License"\);$
 ^ \* you may not use this file except in compliance with the License\.$

java-core/synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-core.git",
-        "sha": "9f26800e9c531ba0b4f9f9bde0786f72ef14c0df"
+        "sha": "0698c6679877e0666c684ea5c5daaf8ebae7c15c"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "87254ac89a9559864c0a245d6b150406439ce3d8"
+        "sha": "09c59c20a4bf0daed1665af59035ff240fe356df"
       }
     }
   ],