Remove LOAD FRAGMENT

It's very troublesome, with flaky semantics and a very restricted use space.

test/link/load-fragment-jr.asm

@@ -1,12 +0,0 @@
-SECTION "main", ROM0
-LOAD FRAGMENT "test", SRAM
-ENDL
-
-; The RPN patch for 'jr Label' in section "alt" refers to section "test",
-; but the object file puts section "test" after section "alt".
-; This case needs to be handled when identifying patches' PC sections.
-SECTION "alt", ROM0
-LOAD FRAGMENT "test", SRAM
-	jr Label
-Label:
-ENDL

test/link/load-fragment/a.asm

@@ -1,4 +0,0 @@
-SECTION "main", ROM0
-LOAD FRAGMENT "test", SRAM
-	db 0
-ENDL

test/link/load-fragment/b.asm

@@ -1,6 +0,0 @@
-SECTION "SECTION2", ROM0
-LOAD FRAGMENT "test", SRAM
-	jr Label
-Label:
-	dw Label
-ENDL

test/link/section-fragment/jr-offset-load/a.asm

@@ -1,4 +0,0 @@
-SECTION FRAGMENT "output", ROM0
-LOAD FRAGMENT "loaded", SRAM
-    ds 128
-ENDL

test/link/section-fragment/jr-offset-load/b.asm

@@ -1,6 +0,0 @@
-SECTION FRAGMENT "output", ROM0
-LOAD FRAGMENT "loaded", SRAM
-label:
-	jr nz, label2
-label2:
-ENDL

test/link/test.sh

@@ -130,17 +130,6 @@ rgblinkQuiet -o $gbtemp2 $otemp
 tryCmp $gbtemp $gbtemp2
 rc=$(($? || $rc))
 
-i="load-fragment.asm"
-startTest
-$RGBASM -o $otemp load-fragment/a.asm
-$RGBASM -o $gbtemp2 load-fragment/b.asm
-rgblinkQuiet -o $gbtemp $otemp $gbtemp2 2>$outtemp
-tryDiff load-fragment/out.err $outtemp
-rc=$(($? || $rc))
-dd if=$gbtemp count=1 bs=$(printf %s $(wc -c < load-fragment/out.gb)) > $otemp 2>/dev/null
-tryCmp load-fragment/out.gb $otemp
-rc=$(($? || $rc))
-
 i="overlay.asm"
 startTest
 $RGBASM -o $otemp overlay/a.asm
@@ -160,15 +149,6 @@ dd if=$gbtemp count=1 bs=$(printf %s $(wc -c < section-fragment/jr-offset/ref.ou
 tryCmp section-fragment/jr-offset/ref.out.bin $otemp
 rc=$(($? || $rc))
 
-i="section-fragment/jr-offset-load.asm"
-startTest
-$RGBASM -o $otemp section-fragment/jr-offset-load/a.asm
-$RGBASM -o $gbtemp2 section-fragment/jr-offset-load/b.asm
-rgblinkQuiet -o $gbtemp $otemp $gbtemp2
-dd if=$gbtemp count=1 bs=$(printf %s $(wc -c < section-fragment/jr-offset-load/ref.out.bin)) > $otemp 2>/dev/null
-tryCmp section-fragment/jr-offset-load/ref.out.bin $otemp
-rc=$(($? || $rc))
-
 i="section-union/good.asm"
 startTest
 $RGBASM -o $otemp section-union/good/a.asm