diff --git a/netwerk/macbuild/netwerkIDL.xml b/netwerk/macbuild/netwerkIDL.xml
index 73852844bf0..b1e8741a54d 100644
--- a/netwerk/macbuild/netwerkIDL.xml
+++ b/netwerk/macbuild/netwerkIDL.xml
@@ -1043,13 +1043,6 @@
                     <FILEKIND>Text</FILEKIND>
                     <FILEFLAGS></FILEFLAGS>
                 </FILE>
-                <FILE>
-                    <PATHTYPE>Name</PATHTYPE>
-                    <PATH>nsIMIMEDataSource.idl</PATH>
-                    <PATHFORMAT>MacOS</PATHFORMAT>
-                    <FILEKIND>Text</FILEKIND>
-                    <FILEFLAGS></FILEFLAGS>
-                </FILE>
                 <FILE>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIMIMEInfo.idl</PATH>
@@ -1666,11 +1659,6 @@
                     <PATH>nsIProtocolProxyService.idl</PATH>
                     <PATHFORMAT>MacOS</PATHFORMAT>
                 </FILEREF>
-                <FILEREF>
-                    <PATHTYPE>Name</PATHTYPE>
-                    <PATH>nsIMIMEDataSource.idl</PATH>
-                    <PATHFORMAT>MacOS</PATHFORMAT>
-                </FILEREF>
                 <FILEREF>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIMIMEInfo.idl</PATH>
@@ -2998,13 +2986,6 @@
                     <FILEKIND>Text</FILEKIND>
                     <FILEFLAGS></FILEFLAGS>
                 </FILE>
-                <FILE>
-                    <PATHTYPE>Name</PATHTYPE>
-                    <PATH>nsIMIMEDataSource.idl</PATH>
-                    <PATHFORMAT>MacOS</PATHFORMAT>
-                    <FILEKIND>Text</FILEKIND>
-                    <FILEFLAGS></FILEFLAGS>
-                </FILE>
                 <FILE>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIMIMEInfo.idl</PATH>
@@ -3614,11 +3595,6 @@
                     <PATH>nsIProtocolProxyService.idl</PATH>
                     <PATHFORMAT>MacOS</PATHFORMAT>
                 </FILEREF>
-                <FILEREF>
-                    <PATHTYPE>Name</PATHTYPE>
-                    <PATH>nsIMIMEDataSource.idl</PATH>
-                    <PATHFORMAT>MacOS</PATHFORMAT>
-                </FILEREF>
                 <FILEREF>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIMIMEInfo.idl</PATH>
@@ -4390,12 +4366,6 @@
             </FILEREF>
         </GROUP>
         <GROUP><NAME>mimetype</NAME>
-            <FILEREF>
-                <TARGETNAME>headers</TARGETNAME>
-                <PATHTYPE>Name</PATHTYPE>
-                <PATH>nsIMIMEDataSource.idl</PATH>
-                <PATHFORMAT>MacOS</PATHFORMAT>
-            </FILEREF>
             <FILEREF>
                 <TARGETNAME>headers</TARGETNAME>
                 <PATHTYPE>Name</PATHTYPE>