reconciled install script discrepancies

nvm.iss

@@ -54,10 +54,7 @@ Name: "english"; MessagesFile: "compiler:Default.isl"
 Name: "quicklaunchicon"; Description: "{cm:CreateQuickLaunchIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked; OnlyBelowVersion: 0,6.1
 
 [Files]
-Source: "{#ProjectRoot}\bin\*"; DestDir: "{app}"; BeforeInstall: PreInstall; Flags: ignoreversion recursesubdirs createallsubdirs; Excludes: "{#ProjectRoot}\bin\install.cmd {#ProjectRoot}\bin\nvm-arm64.exe {#ProjectRoot}\bin\nvm-64.exe {#ProjectRoot}\bin\nvm.exe"
-Source: "{#ProjectRoot}\bins\nvm-arm64.exe"; DestDir: "{app}"; DestName: "nvm.exe"; Check: InstallARM64; Flags: solidbreak
-Source: "{#ProjectRoot}\bins\nvm-64.exe"; DestDir: "{app}"; DestName: "nvm.exe"; Check: InstallX64; Flags: solidbreak
-Source: "{#ProjectRoot}\bins\nvm.exe"; DestDir: "{app}"; DestName: "nvm.exe"; Check: InstallOtherArch;
+Source: "{#ProjectRoot}\bin\*"; DestDir: "{app}"; BeforeInstall: PreInstall; Flags: ignoreversion recursesubdirs createallsubdirs; Excludes: "{#ProjectRoot}\bin\install.cmd"
 
 [Icons]
 Name: "{group}\{#MyAppShortName}"; Filename: "{app}\{#MyAppExeName}"; IconFilename: "{#MyIcon}"
@@ -71,21 +68,6 @@ Root: HKCR; Subkey: "{#MyAppShortName}\DefaultIcon"; ValueType: string; ValueNam
 Root: HKCR; Subkey: "{#MyAppShortName}\shell\launch\command"; ValueType: string; ValueName: ""; ValueData: """{app}\{#MyAppExeName}"" ""%1"""; Flags: uninsdeletekey
 
 [Code]
-function InstallX64: Boolean;
-begin
-  Result := Is64BitInstallMode and (ProcessorArchitecture = paX64);
-end;
-
-function InstallARM64: Boolean;
-begin
-  Result := Is64BitInstallMode and (ProcessorArchitecture = paARM64);
-end;
-
-function InstallOtherArch: Boolean;
-begin
-  Result := not InstallX64 and not InstallARM64;
-end;
-
 var
   SymlinkPage: TInputDirWizardPage;
   NotificationOptionPage: TInputOptionWizardPage;