Remove pip install commands

1.data_preprocessing.ipynb

@@ -22,22 +22,6 @@
     "[Back to contents](#Contents)"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "**Please note that the following cell may require working VPN to work**"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# %pip install pandas"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 2,

2.1.association_rules_apriori_fpg.ipynb

@@ -19,23 +19,6 @@
     "[Back to contents](#Contents)"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "**Please note that the following cell may require working VPN to work**"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# %pip install mlxtend==0.23.1\n",
-    "# %pip install TIME-python"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 2,

2.2.association_rules_eclat.ipynb

@@ -19,23 +19,6 @@
     "[Back to contents](#Contents)"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "**Please note that the following cell may require working VPN to work**"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# %pip install pyECLAT\n",
-    "# %pip install numpy"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 2,