Updates to fisheries example - shorter title and removing minor imports

Author: michaeldenes

docs/examples/example_Croatian_fisheries.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Sensitivity of biofouling parameters - The pathways and fate of plastic pollution from Croatian registered fishing vessels\n",
+    "# Sensitivity of biofouling parameters - Plastic pollution from Croatian fishing vessels\n",
     "In this example, we will use `plasticparcels` to run a basic simulation of microplastic pollution emitted from Croatian registered fishing vessels. We will use the [Open-sea fishing-related plastic emissions dataset](https://plastic.oceanparcels.org/en/latest/initialisationmaps.html#open-sea-fishing-related-plastic-emissions) to release virtual particles in ocean model grid cells, using the 3D velocity fields to advect the particles. We also include the effects of biofouling and Stokes drift on the particles. We will run two simulations, one with the default biofouling parameters, and another where we vary some of the biofouling parameters."
    ]
   },
@@ -16,8 +16,7 @@
    "source": [
     "# Library imports\n",
     "from datetime import datetime, timedelta\n",
-    "import os\n",
-    "os.chdir('../../')\n",
+    "\n",
     "# Parcels and PlasticParcels imports\n",
     "import plasticparcels as pp\n",
     "\n",