Reduce explicit template parameters in writeData

Change-Id: I0715a93dd97d6047e85ead7e64d3dabcc314bd98
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/time-config.cpp b/time-config.cpp
index ff62782..9e70044 100644
--- a/time-config.cpp
+++ b/time-config.cpp
@@ -265,7 +265,7 @@
         std::cout <<"Successfully updated UseNtp=["
                   << useDhcpNtp << "]" << std::endl;
 
-        r = writeData<decltype(useDhcpNtp)>(cv_DhcpNtpFile, useDhcpNtp);
+        r = writeData(cv_DhcpNtpFile, useDhcpNtp);
     }
 
     return 0;