Code Cleanup: Fix yyinput warnings

.. we can tell flex to not generate the yyinput code in the
first place, to remove compiler warnings about emitting yyinput()

src/DataFilter.l

@@ -28,6 +28,7 @@
 %}
 %option noyywrap
 %option nounput
+%option noinput
 %%
 
 "="                                         DataFilterlval.op = EQ; return EQ;

src/JsonRideFile.l

@@ -38,6 +38,7 @@
 %}
 %option noyywrap
 %option nounput
+%option noinput
 %%
 \"RIDE\"            return RIDE;
 \"STARTTIME\"       return STARTTIME;

src/WithingsParser.l

@@ -39,6 +39,7 @@
 %}
 %option noyywrap
 %option nounput
+%option noinput
 %%
 \"status\"            return STATUS;
 \"body\"              return BODY;