Remove debris if shell integration is available

Author: anthonykim1

src/features/terminal/shells/bash/bashStartup.ts

@@ -71,10 +71,10 @@ async function isStartupSetup(profile: string, key: string): Promise<ShellSetupS
 
 async function setupStartup(profile: string, key: string, name: string): Promise<boolean> {
     if (shellIntegrationForActiveTerminal(name, profile)) {
+        removeStartup(profile, key);
         return true;
     }
     const activationContent = getActivationContent(key);
-
     try {
         if (await fs.pathExists(profile)) {
             const content = await fs.readFile(profile, 'utf8');

src/features/terminal/shells/fish/fishStartup.ts

@@ -59,6 +59,7 @@ async function isStartupSetup(profilePath: string, key: string): Promise<boolean
 async function setupStartup(profilePath: string, key: string): Promise<boolean> {
     try {
         if (shellIntegrationForActiveTerminal('fish', profilePath)) {
+            removeFishStartup(profilePath, key);
             return true;
         }
         const activationContent = getActivationContent(key);

src/features/terminal/shells/pwsh/pwshStartup.ts

@@ -146,6 +146,7 @@ async function isPowerShellStartupSetup(shell: string, profile: string): Promise
 
 async function setupPowerShellStartup(shell: string, profile: string): Promise<boolean> {
     if (shellIntegrationForActiveTerminal(shell, profile)) {
+        removePowerShellStartup(shell, profile);
         return true;
     }
     const activationContent = getActivationContent();