Fix #3: Remove Fable.Core dependency

Author: alfonsogarciacaro

src/UnitsOfMeasure.Extra.fsproj

@@ -12,7 +12,4 @@
   <ItemGroup>
     <Content Include="*.fsproj; *.fs" PackagePath="fable\" />
   </ItemGroup>
-  <ItemGroup>
-    <PackageReference Include="Fable.Core" Version="2.0.2" />
-  </ItemGroup>
 </Project>