Remove LiquidCrystal from main repo

Since there are no pending PRs or Issues, remove the folder and use https://github.com/arduino-libraries/LiquidCrystal as reference repo

Author: facchinm

build/LiquidCrystal-1.0.6.zip.sha

@@ -0,0 +1 @@
+e4cf07a15b595213b982a54977adddc100e06aee

build/build.xml

@@ -240,6 +240,7 @@
     <download-library name="Keyboard" version="1.0.1"/>
     <download-library name="SD" version="1.1.1"/>
     <download-library name="Servo" version="1.1.2"/>
+    <download-library name="LiquidCrystal" version="1.0.6"/>
     <download-library githubuser="Adafruit" name="Adafruit_CircuitPlayground" version="1.6.8" foldername="Adafruit_Circuit_Playground"/>
   </target>