Revert "Add default package source mapping for central package versions"

This reverts commit 7481dc0.

We cannot add this since this breaks other repositories where central
package versions is not used. It's best to selectively add NoWarn for
whatever warnings are raised by this feature.

Author: kzu

src/nuget.config

@@ -1,23 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
-  <config>
-    <add key="signatureValidationMode" value="accept" />
-  </config>
-  <trustedSigners>
-    <author name="Microsoft">
-      <certificate fingerprint="3F9001EA83C560D712C24CF213C3D312CB3BFF51EE89435D3430BD06B5D0EECE" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
-      <certificate fingerprint="AA12DA22A49BCE7D5C1AE64CC1F3D892F150DA76140F210ABD2CBFFCA2C18A27" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
-    </author>
-    <repository name="nuget.org" serviceIndex="https://api.nuget.org/v3/index.json">
-      <certificate fingerprint="0E5F38F57DC1BCC806D8494F4F90FBCEDD988B46760709CBEEC6F4219AA6157D" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
-      <certificate fingerprint="5A2901D6ADA3D18260B9C6DFE2133C95D74B9EEF6AE0E5DC334C8454D1477DF4" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
-      <certificate fingerprint=" CF7AC17AD047ECD5FDC36822031B12D4EF078B6F2B4C5E6BA41F8FF2CF4BAD67" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
-      <certificate fingerprint="C474CE76007D02394E0DA5E4DE7C14C680F9E282013CFEF653EF5DB71FDF61F8" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
-    </repository>
-  </trustedSigners>
-  <packageSourceMapping>
-    <packageSource key="nuget.org">
-      <package pattern="*" />
-    </packageSource>
-  </packageSourceMapping>
+    <config>
+      <add key="signatureValidationMode" value="accept" />
+    </config>
+    <trustedSigners>
+      <author name="Microsoft">
+        <certificate fingerprint="3F9001EA83C560D712C24CF213C3D312CB3BFF51EE89435D3430BD06B5D0EECE" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
+        <certificate fingerprint="AA12DA22A49BCE7D5C1AE64CC1F3D892F150DA76140F210ABD2CBFFCA2C18A27" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
+      </author>
+      <repository name="nuget.org" serviceIndex="https://api.nuget.org/v3/index.json">
+        <certificate fingerprint="0E5F38F57DC1BCC806D8494F4F90FBCEDD988B46760709CBEEC6F4219AA6157D" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
+        <certificate fingerprint="5A2901D6ADA3D18260B9C6DFE2133C95D74B9EEF6AE0E5DC334C8454D1477DF4" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
+        <certificate fingerprint=" CF7AC17AD047ECD5FDC36822031B12D4EF078B6F2B4C5E6BA41F8FF2CF4BAD67" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
+        <certificate fingerprint="C474CE76007D02394E0DA5E4DE7C14C680F9E282013CFEF653EF5DB71FDF61F8" hashAlgorithm="SHA256" allowUntrustedRoot="true" />
+      </repository>
+    </trustedSigners>
 </configuration>