sqlite3-tools: remove pre-activate block

Was added in 83dd502, alongside tcl @8.6.6_1 in 2ed3be5,
to resolve a conflict with tcl. Over two years have passed
since this conflict was resolved.

databases/sqlite3/Portfile

@@ -115,16 +115,4 @@ subport ${name}-tools {
         xinstall -m 755 ${worksrcpath}/sqldiff ${destroot}${prefix}/bin
         xinstall -m 755 ${worksrcpath}/sqlite3_analyzer ${destroot}${prefix}/bin
     }
-    pre-activate {
-        # tcl previously conflicted because it installed files now provided by sqlite3-tools
-        if {![catch {set installed [lindex [registry_active tcl] 0]}]} {
-            set _version [lindex $installed 1]
-            set _revision [lindex $installed 2]
-            set _cmp866 [vercmp $_version 8.6.6]
-            if {($_cmp866 < 0) || ($_cmp866 == 0 && $_revision < 1)} {
-                # tcl used to install some files now provided by sqlite3-tools in versions < 8.6.6_1
-                registry_deactivate_composite tcl "" [list ports_nodepcheck 1]
-            }
-        }
-    }
 }