refactor(s11d/rope): Address PR FoxdieTeam#2135 review feedback

Implement changes requested by reviewer KieronJ:

- Remove 9 compiler-inserted division overflow checks (div_result == -1)
  These checks are automatically inserted by PSY-Q compiler for MIPS
  division overflow handling and should not be manually added in source

- Remove duplicate extern declarations:
  * data_800C32B4, data_800C32B8 (were declared twice)
- Fix typo in function name: func_8001511C8 -> func_800151C8
- Remove unused declaration: func_8003152948 (not referenced in rope.c)

These changes improve code quality without affecting binary matching.
Build verification will be performed by CI on Windows/Linux platforms.

Addresses: PR FoxdieTeam#2135 review comments

Author: mak1jk

source/overlays/s11d/chara/rope/rope.c

@@ -4868,11 +4868,6 @@ void s11d_rope_800C5B10(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto div_error;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto div_check;
@@ -4925,11 +4920,6 @@ void s11d_rope_800C5B10(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto skip_4000_logic;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto continue_4000;
@@ -4977,11 +4967,6 @@ void s11d_rope_800C5B10(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto skip_400_logic;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto continue_400;
@@ -5097,11 +5082,6 @@ void s11d_rope_800C5E74(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto div_error;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto div_check;
@@ -5154,11 +5134,6 @@ void s11d_rope_800C5E74(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto skip_4000_logic;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto continue_4000;
@@ -5206,11 +5181,6 @@ void s11d_rope_800C5E74(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto skip_400_logic;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto continue_400;
@@ -5325,11 +5295,6 @@ void s11d_rope_800C6544(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto check_4000;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto apply_div_1;
@@ -5378,11 +5343,6 @@ void s11d_rope_800C6544(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto check_400;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto apply_div_2;
@@ -5430,11 +5390,6 @@ void s11d_rope_800C6544(void *work)
 
     div_result = temp_calc / calc_value;
 
-    if (div_result == -1)
-    {
-        goto finalize;
-    }
-    
     if (div_result == 0x80000000)
     {
         goto apply_div_3;

source/overlays/s11d/chara/rope/rope.h

@@ -13,16 +13,11 @@ typedef struct RopeWork
 // External data symbols
 extern int s11d_dword_800C32B4;
 extern int s11d_dword_800C32B8;
-extern unsigned int GM_GameStatus;
-
-// External function declarations - consolidated from inline externs
-extern char linkvarbuf;
-extern char DG_ZeroVector;
-extern int s11d_dword_800C32B4;
-extern int s11d_dword_800C32B8;
 extern int s11d_dword_800C32BC;
 extern int s11d_dword_800C32C4;
 extern int s11d_dword_800C32CC;
+extern char linkvarbuf;
+extern char DG_ZeroVector;
 extern int data_800BB9B4;    // Counter
 extern int data_800BB9D4;
 extern int data_800BB9F4;
@@ -33,7 +28,6 @@ extern int func_80016CCC(void *);
 extern int func_80016D00(void *, void *, void *);
 extern int func_80016D40(void *, void *, void *);
 extern int func_80031298(void *);
-extern int func_8003152948(void *);
 extern int func_80044DE0(void *);
 extern int func_80044FC8(void *);
 extern int func_80045298(void *);
@@ -57,7 +51,7 @@ extern void *func_800209E8(void *);
 extern void *func_80020A14(void *);
 extern void *func_80020AA4(void);
 extern void *func_8002D400(void *);
-extern void func_8001511C8(void *, void *);
+extern void func_800151C8(void *, void *);
 extern void func_80018C2E0(void *);
 extern void func_8001BC04(void *);
 extern void func_8001BC44(void *);