diff --git a/buildtools/fslex/App.config b/buildtools/fslex/App.config
deleted file mode 100644
index e1b09eda9fa..00000000000
--- a/buildtools/fslex/App.config
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <startup>
-    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
-  </startup>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="FSharp.Core" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.3.0.0" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/buildtools/fsyacc/App.config b/buildtools/fsyacc/App.config
deleted file mode 100644
index e1b09eda9fa..00000000000
--- a/buildtools/fsyacc/App.config
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <startup>
-    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
-  </startup>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="FSharp.Core" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.3.0.0" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file