Bug #615168: Remove spurious (require 'hash-table) instances except report-system.scm

Patch by Andy Wingo, but except report-system.scm.

There is nothing that the slib hash-table module provides that was used
in any of these files; they all used Guile's stock hash tables.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@19147 57a11ea4-9604-0410-9ed3-97b8803252fd

src/business/business-reports/aging.scm

@@ -31,8 +31,6 @@
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
 
-(require 'hash-table)
-
 (gnc:module-load "gnucash/report/report-system" 0)
 (gnc:module-load "gnucash/business-core" 0)
 

src/business/business-reports/easy-invoice.scm

@@ -35,8 +35,6 @@
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
 
-(require 'hash-table)
-
 (gnc:module-load "gnucash/report/report-system" 0)
 (gnc:module-load "gnucash/business-utils" 0)
 

src/business/business-reports/fancy-invoice.scm

@@ -53,8 +53,6 @@
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
 
-(require 'hash-table)
-
 (gnc:module-load "gnucash/report/report-system" 0)
 (gnc:module-load "gnucash/business-utils" 0)
 

src/business/business-reports/invoice.scm

@@ -29,8 +29,6 @@
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
 
-(require 'hash-table)
-
 (gnc:module-load "gnucash/report/report-system" 0)
 (gnc:module-load "gnucash/business-utils" 0)