Remove __rseed random value from XSLT-based compiler

This was used before __pkguniq to generate identifiers.  Back then, I seemed
to think determinism was a problem and that randomness was desirable for
helping to ensure uniqueness between packages.  That was a mistake; we
_want_ a deterministic system (which is far easier to debug and verify the
results of), we just want uniqueness.

DEV-14965

src/current/include/dslc-base.xsl

@@ -73,15 +73,6 @@
 -->
 <param name="__relroot" />
 
-
-<!--
-  Random value that may be used to seed random values
-
-  XSLT is deterministic and does not offer support for generating random values;
-  its generate-id() function is not sufficient for cross-package generation.
--->
-<param name="__rseed" />
-
 <!--
   A package-unique string
 

src/current/include/preproc/package.xsl

@@ -55,13 +55,6 @@
 
   <param name="stopshort" />
 
-  <!-- should be provided externally -->
-  <if test="not( $__rseed ) or ( $__rseed = '' )">
-    <message terminate="yes">
-      <text>[preproc] error: missing random seed `__rseed'</text>
-    </message>
-  </if>
-
   <message>
     <text>[preproc] *beginning macro expansion...</text>
   </message>

src/current/src/com/lovullo/dslc/DslCompiler.java

@@ -160,10 +160,6 @@ public class DslCompiler
                 new QName( "__relroot" ),
                 XdmValue.makeValue( relroot )
             );
-            t.setParameter(
-                new QName( "__rseed" ),
-                XdmValue.makeValue( (int)( Math.random() * 10e6 ) )
-            );
             t.setParameter(
                 new QName( "__pkguniq" ),
                 XdmValue.makeValue( _createPkgUniq( srcpkg ) )