Remove Duplicate Characters from a String

Code

#include <stdio.h>
#include <stdint.h>

void pop(char* temp){
     int i =0;
     while(temp[i]!=0){
        temp[i] = temp[i+1];
        i++;
     }
}
void remove_duplicates(char *str) {
	//Your logic here
    int cnt = 0;
    while(str[cnt] != 0){
        for(int i=cnt+1;str[i]!=0;i++){
            if(str[cnt] == str[i]){
                pop(str+i);
            }
        }
        cnt++;
    }
    }

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    remove_duplicates(str);
    printf("%s", str);
    return 0;
}

Solving Approach