HPCC-26976 Remove prototype.js related files

Multiple code scanning alerts are reported in prototype.js by CodeQL.
In this fix, prototype.js related code is removed because it is only
used by legacy ECLWatch and legacy ECLWatch should be obsolete.

Signed-off-by: wangkx <kevin.wang@lexisnexis.com>

esp/eclwatch/ws_XSLT/dfu_searchdata.xslt

@@ -71,7 +71,6 @@
                 <title>EclWatch</title>
         <script type="text/javascript" src="/esp/files/scripts/espdefault.js">&#160;</script>
         <xsl:text disable-output-escaping="yes"><![CDATA[
-        <script type="text/javascript" src="/esp/files/scripts/prototype.js"></script>
         <script type="text/javascript" src="/esp/files/scripts/scriptaculous.js"></script>
         <script type="text/javascript" src="/esp/files/scripts/dragdrop.js"></script>
         ]]></xsl:text>

esp/files/scripts/CMakeLists.txt

@@ -46,7 +46,6 @@ set ( SCRIPTS_FILES
     ${CMAKE_CURRENT_SOURCE_DIR}/LogsWidget.js
     ${CMAKE_CURRENT_SOURCE_DIR}/multiselect.js
     ${CMAKE_CURRENT_SOURCE_DIR}/objtree.js
-    ${CMAKE_CURRENT_SOURCE_DIR}/prototype.js
     ${CMAKE_CURRENT_SOURCE_DIR}/prototype_helpers.js
     ${CMAKE_CURRENT_SOURCE_DIR}/range.js
     ${CMAKE_CURRENT_SOURCE_DIR}/ResultsWidget.js